CrisisCare

It is a staggering toll, almost 200,000 people dead from the coronavirus in the United States, and close to one million people around the world.

And the pandemic, which sent cases spiking skyward in many countries and then trending downward after lockdowns, has reached a precarious point. Will countries like the United States see the virus continue to slow? Or is a new surge on the way?

LONDON — With Britons fretting last week that a new six-person limit on gatherings would effectively cancel Christmas, Prime Minister Boris Johnson unveiled what he called Operation Moonshot, an audacious plan to test 10 million people every day for the coronavirus and restore life to normal by winter.